Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS

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Tables
1. Original design characteristics of the Soil Conservation Service
flood-retention structures ...........................................................................................................6
2. Hydraulic model limits for selected streams in the Chippewa Creek basin,
Medina, Wayne, and Summit Counties, Ohio ...........................................................................6
3. Summary of data collected from field surveys used for the step-backwater
models in the Chippewa Creek basin, in Medina, Wayne, Stark,
and Summit Counties, Ohio .........................................................................................................7
4. List of benchmarks used to establish a Global Positioning System
control network for the surveying of the Chippewa Creek basin and
the accuracies of those measurements ...................................................................................8
5. Basin characteristics and approximate bankfull flow at various locations
for selected streams in the Chippewa Creek basin ................................................................9
6. Average decrease in water-surface elevation, in feet, along the selected
reach after decreasing the Manning’s roughness coefficient (n) for the
main channel by 5, 10, 15, and 20 percent from the base values .......................................11
2–1. Selected Hydrologic Engineers Center’s River Analysis System
output for Chippewa Creek, Medina, Wayne, and Summit Counties, Ohio. ......................34
2–2. Selected Hydrologic Engineers Center’s River Analysis System
output for Westfield Ditch, Medina County, Ohio .................................................................... 46
2–3. Selected Hydrologic Engineers Center’s River Analysis System
output for River Styx, Medina and Wayne Counties, Ohio ....................................... 48
2–4. Selected Hydrologic Engineers Center’s River Analysis System
output for Little Chippewa Creek , Wayne County, Ohio ....................................................................54
3–1. Water-surface elevation, in feet, along Chippewa Creek after decreasing
the Manning’s roughness coefficient (n) for the main channel
by 5, 10, 15, and 20 percent .......................................................................................................59
3–2. Water-surface elevation, in feet, along River Styx after decreasing
the Manning’s roughness coefficient (n) for the main channel
by 5, 10, 15, and 20 percent .......................................................................................................71
3–3. Water-surface elevation, in feet, along Little Chippewa Creek
after decreasing the Manning’s roughness coefficient (n) for the
main channel by 5, 10, 15, and 20 percent ..............................................................................77